Two-step step stool



FIG. 1 is a front perspective view of a two-step step stool embodying our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a side elevational view thereof; the opposite side being a mirror image. 

The ornamental design for a two-step step stool, as shown and described. 